15 



ZOOPHYTOLOGY. 



Descriptions o/New or imperfectly known Polyzoa. No. 1. 



1. Cheilostomata. 



Fam. 1. MEMBBAKirORID^, B. 



Gen. 1. Membranipora. Blain. 



1. M. delicaUssima, n. sp. PI. XXXIV, fig. 1. 



M. membranacea, inermis ; cellulis oblongis aperlura permagna, ovali ; 

 marffine'Jeiiui, lavL Orificio semi-orbiculari. 



Membranaceous, unarmed; cells oblong; aperture occupying almost the 

 entire area — oval; margins thin, smooth; orifice semicircular. 



Hub. — St.VGeorge's Sound, South Australia, on the fronds of Amaiisia 

 fiiinatijidu, W. Harvey. 



This delicate and elegant Membranipora appears to occur 

 exclusively on the slender, ligulate fronds of Amansia jnnnati- 

 fida, which we believe is rarely seen without its gauze-like 

 parasitic covering. 



Fam. 2. rLUSTiiiD.«, D'Orb. 

 Gen. 2. Spiralaria, n.g. 

 Polyzoario ramoso ; ramis cylindricis e lamina U7igustd xpiraliler contortd 

 constilutis. Cellulis adfaciem superiorem tantum spectantibus, murginalibus 

 armatis. 



Polyzoarium composed of short, cylindrical branches, attenuated at each 

 extremity. The branches are constituted by a narrow lamina, twisted spi- 

 rally round an imaginary axis, and having the openings of the cells on the 

 upper surface only ; the marginal cells armed with sessile avicularia. 



1. S.florea, n. sp. PI. XXXIV, fig. 2. 



Hab. — Australia. 



For this species, which is perhaps one of the most beautiful 

 and curious of the Polyzoa, we are indebted to Mr. W. Flowers, 

 of Croydon, whose name has suggested the specific appellation. 

 He procured it from Australia. The light and feathery 

 polyzoary is irregularly branched^ and forms a tuft of an 



